For the second time this year, the University of Texas M.D. Anderson Cancer Center has suffered a patient data breach. On Friday, the hospital announced that a medical student trainee working for the facility lost an unencrypted portable hard drive while riding on an employee shuttle bus on July 13.

The device contained information for 2,200 patients, including names and health data, according to the Houston Chronicle, all of whom were notified of the event via mail. No Social Security numbers or financial information was on the drive.